Peculiarities of Forming a Multiband Transmission Function Based on Multifrequency Acousto-Optic Diffraction
- Authors: Proklov V.V.1, Rezvov Y.G.2
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Affiliations:
- Kotel’nikov Institute of Radio Engineering and Electronics, Fryazino Branch
- Mendeleev University of Chemical Technology, Novomoskovsk Branch
- Issue: Vol 124, No 1 (2018)
- Pages: 121-128
- Section: Physical Optics
- URL: https://ogarev-online.ru/0030-400X/article/view/165619
- DOI: https://doi.org/10.1134/S0030400X18010174
- ID: 165619
Cite item
Abstract
An analytical solution for the transmission function of noncoherent wideband radiation is obtained under acousto-optic (AO) filtering using a discrete set of monochromatic AO waves with a small spectral overlap. We studied characteristics of the AO transformation of a continuous spectrum of noncoherent radiation into a given set of discrete narrow bands of spectral transmission by excitation of a discrete set of sound frequencies. We carried out the analysis of transmission functions of individual channels taking into account a partial overlap of their spectra and possible intermodulation distortions. It is shown that a stationary value of the root-mean-square light power is found at the electronic output due to the photoelectric transformation and detecting diffracted light. Based on this, a necessary stationary, multiband, and nearly equidistant transmission function of a device can be formed by using a relevant spectrum of acoustic excitation. Peculiarities of this way of forming the multiband transmission function are revealed: the limitation of diffraction efficiency for an individual channel, the possibility of decoupling side lobes of adjacent channels, etc. A multiband acousto-optic filter (MAOF) was simulated that was based on a paratellurite monocrystal (TeO2), which was previously used for experimental optical encoding. The theoretical and experimental results are in gratifying agreement.
About the authors
V. V. Proklov
Kotel’nikov Institute of Radio Engineering and Electronics, Fryazino Branch
Email: rezvovyug@mail.ru
Russian Federation, Fryazino, Moscow oblast, 141190
Yu. G. Rezvov
Mendeleev University of Chemical Technology, Novomoskovsk Branch
Author for correspondence.
Email: rezvovyug@mail.ru
Russian Federation, Novomoskovsk, 301665
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